Kollmorgen S21260-SRS Servo Drive Detailed Product Description

I. Product Overview

S21260-SRS is a high-performance digital brushless servo drive from Kollmorgen's S200 (ServoStar CD) series, belonging to the medium-large power level servo control core component. The product integrates advanced DSP digital signal processing technology, a 24-bit high-resolution feedback system, and a 3-5kHz wide current loop bandwidth. It supports full closed-loop control of position, speed, and torque, and possesses core advantages such as high dynamic response, ultra-high control accuracy, large power density, and industrial-grade stability and reliability, specifically designed for large-power, high-dynamic motion control scenarios in robots, heavy machinery, and large-scale automated production lines. 

II. Basic Specification Parameters

1. Core Electrical Parameters

Brand Model: Kollmorgen S21260-SRS

Product Series: S200 (ServoStar CD) High-performance Brushless Servo Drive Input Voltage:

Communication: 120/240V AC (single phase / three phase, compatible with 0-264V AC wide voltage range)

DC: 230V DC (direct bus power supply mode)

Rated power: 13.8kW (continuous)

Output current: 13A RMS (continuous), 26A RMS (peak, lasting 3s)

Current loop bandwidth: 3-5kHz (high dynamic core indicator)

Speed loop bandwidth: Maximum 800Hz

PWM switching frequency: Maximum 30kHz

Control power supply: Independent 24V DC (Keep Alive, maintains communication in case of power failure)

Feedback resolution: 24-bit ultra-high resolution

Control mode: Position control, speed control, torque control (full closed loop)

Applicable motors: Kollmorgen AKM series and third-party high-power brushless servo motors

2. Physical and environmental parameters

Size: Approximately 178mm × 127mm × 51mm (compact book-like)

Weight: Approximately 0.9kg

Protection level: IP20 (installed in cabinet)

Installation method: DIN rail installation / panel fixation

Operating temperature: 0°C ~ +40°C (temperature reduction for high temperatures)

Storage temperature: -20°C ~ +70°C

Relative humidity: 5%~95% (no condensation)

Certification standards: UL 508C, CE, EN50178, EN61800-C

3. Interface and communication characteristics

Feedback interface: Supports EnDat 2.2, Resolver (rotary encoder), incremental / absolute encoders

Communication protocol: EtherCAT, CANopen, Sercos III, SynqNet (real-time motion bus)

Control signals:

Analog: ±10V torque / speed setting input

Digital: Pulse / direction (Step/Dir), optically isolated digital I/O

Safety function: Integrated STO (Safe Torque Off), cuts motor torque in case of faults, meets international safety standards.

I/O characteristics: 24V optically isolated, compatible with PLC; anti-misinsertion locking connector

III. Core functional characteristics

1. Dual excellent performance of high power and high dynamics

13.8kW continuous power, 26A peak current, meets the requirements for driving large loads and high torque scenarios.

3-5kHz current loop bandwidth + 800Hz speed loop bandwidth, rapid dynamic response, no lag during frequent acceleration and deceleration, zero overshoot in trajectory control.

24-bit ultra-high resolution feedback, position accuracy up to ±0.001°, speed accuracy ±0.01%, ultra-smooth operation at low speed.

2. Intelligent plug-and-play debugging

Equipped with intelligent electronic motor nameplate, automatically identifies motor parameters and feedback types, no need for manual complex configuration.

Built-in adaptive PID parameter self-tuning, one-click optimization of control parameters, significantly shortens debugging cycle and lowers technical threshold.

3. Comprehensive safety and protection mechanisms

Safety function: Integrated STO (Safe Torque Off), cuts motor torque in case of faults, meets international safety standards.

Electrical protection: Overcurrent, overload, overvoltage, undervoltage, overheating, output short circuit / ground fault full-dimensional protection, self-lock alarm for faults.

Signal isolation: Full I/O optically isolated, strong anti-electromagnetic interference (EMI), suitable for complex industrial electromagnetic environment.

4. Flexible multi-axis integration capability

Supports shared DC bus multi-axis networking, efficient energy feedback, energy saving and consumption reduction, suitable for multi-axis synchronous control scenarios.

Multi-protocol communication compatibility (EtherCAT/CANopen/SynqNet), seamless connection with mainstream PLCs and motion controllers. Compact design, small size, high power density, saves control cabinet space, supports dense installation.

5. Industrial-grade high reliability

Wide temperature and voltage design, adaptable to voltage fluctuations and harsh environments in industrial sites.

Enhanced heat dissipation structure + industrial-grade electronic components, resistant to vibration and dust, supports 7×24-hour continuous stable operation.

Modular design, easy fault location, convenient maintenance, reduces downtime and operation costs.

Four. Application fields

Industrial robots: heavy-duty six-axis robots, Delta robots, large-palletizing robots joint drive.

Heavy-duty machine tools: CNC machining centers, gantry lathes, laser cutting machines, large grinding machines feed systems.

Automation lines: automotive manufacturing lines, heavy-duty assembly equipment, logistics sorting systems.

Packaging printing machinery: high-speed packaging machines, large printing machines, slitting machines, roll paper conveying systems.

Textile / rubber equipment: high-speed spinning machines, precision injection molding machines, extruders servo control.

Medical / semiconductor: large medical imaging equipment, wafer transfer equipment, semiconductor inspection equipment.

Five. Summary of product core advantages

High power + high dynamics: 13.8kW power + 3-5kHz bandwidth, balancing heavy load and fast response.

Ultra-high precision: 24-bit feedback + self-tuning algorithm, achieving micron-level positioning and ultra-smooth movement.

Safe and reliable: STO safety function + full protection, compliant with industrial safety standards.

Flexible integration: multi-protocol communication + shared bus, suitable for complex multi-axis automation systems.

Easy to use and efficient: intelligent identification + self-tuning, plug-and-play, significantly reducing debugging and operation costs.

Six. Installation and commissioning key points

Install vertically in a well-ventilated control cabinet, reserve heat dissipation gap, avoid dust, oil stains and corrosive environments.

Separate power lines and signal lines, strictly separate wiring, use shielded cables, reduce electromagnetic interference.

Confirm voltage, motor parameters, feedback type match before commissioning, complete self-tuning and parameter calibration through bus software.

Regularly clean heat dissipation grilles, check terminal tightness, prevent poor contact from causing faults.

Seven. Notes

This description is based on the official standard specifications of Kollmorgen. Actual parameters are subject to the original factory technical manual and product nameplate. S21260-SRS is a high-power industrial-grade servo driver. Installation, commissioning and maintenance must be carried out by professional electrical engineers. Do not perform electrical operations under power or modify privately.